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-rw-r--r--drivers/input/touchscreen/wacom_w8001.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/wacom_w8001.c b/drivers/input/touchscreen/wacom_w8001.c
index b1b412766da8..0c9191cf324d 100644
--- a/drivers/input/touchscreen/wacom_w8001.c
+++ b/drivers/input/touchscreen/wacom_w8001.c
@@ -339,6 +339,15 @@ static irqreturn_t w8001_interrupt(struct serio *serio,
w8001->idx = 0;
parse_multi_touch(w8001);
break;
+
+ default:
+ /*
+ * ThinkPad X60 Tablet PC (pen only device) sometimes
+ * sends invalid data packets that are larger than
+ * W8001_PKTLEN_TPCPEN. Let's start over again.
+ */
+ if (!w8001->touch_dev && w8001->idx > W8001_PKTLEN_TPCPEN - 1)
+ w8001->idx = 0;
}
return IRQ_HANDLED;